Sarah, do keep an eye on that cute little fish known as the clown sweetlips. From Bob Fenner's WetWebMedia:
"Plectorhinchus chaetodonoides Lacepede 1801, the Clown or Harlequin Sweetlips. Western Pacific. To twenty nine inches. One of the most commonly used species of the family... but rarely lives more than a few days in captivity. Images of a juvenile (about three inches) in Fiji, a four inch or so individual in Mabul, Malaysia and a foot long adult in Fiji."
Here's the adult pic:
IF it survives, as it grows, it will eat other fish small enough to fit into it's mouth.
Here's a link to some of the F A Qs on the sweetlips:
WWM/FAQs /Sweetlips